package com.iflytek.cosmo.ocr.common.util;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.lang3.StringUtils;

public class IpAddress {
	/**
	 * 从HttpServletRequest 获取ip地址
	 * (周伟新增)
	 * @param request
	 * @return 远端ip地址
	 */
	public static String getRemoteIpAddr(HttpServletRequest request) {
		String ip = request.getHeader("X-Forwarded-For");
		if (StringUtils.isNotEmpty(ip) && !"unKnown".equalsIgnoreCase(ip)) {
			// 多次反向代理后会有多个ip值，第一个ip才是真实ip
			int index = ip.indexOf(",");
			if (index != -1) {
				return ip.substring(0, index);
			} else {
				return ip;
			}
		}
		ip = request.getHeader("X-Real-IP");
		if (StringUtils.isNotEmpty(ip) && !"unKnown".equalsIgnoreCase(ip)) {
			return ip;
		}
		return request.getRemoteAddr();
	}

}
